reservoir-n; 4 Senses

Sense Number 1: a supply or source, a collection of something

Commentary: RESERVOIR[+quantity][+supply][+resource]

The small company had depleted its reservoirs of cash within six months.
The Internet has become a huge reservoir of information.
Oil pooled in reservoirs between the layers of sedimentary rock.

WordNet 3.0 Sense Numbers: 1

Sense Number 2: an artificial lake

Commentary: RESERVOIR[+entity][+structure][+lake][+artificial]

Swimming and boating isn't allowed at the town reservoir.
They built a dam and flooded the valley to make a new reservoir.
This reservoir provides water to much of the northern part of the state.

WordNet 3.0 Sense Numbers: 2

Sense Number 3: a storage tank for substances such as water, oil

Commentary: RESERVOIR[+entity][+artifact][+container][+tank][+storage][+water/+oil]

A mysterious blast destroyed two petrochemical reservoirs near the harbor.
The tall, brightly painted reservoirs could be seen from our airplane.

WordNet 3.0 Sense Numbers: 3

Sense Number 4: a host site for an infectious agent

Commentary: RESERVOIR[+location][+site][+host][+agent][+infectious]

This species of bird serves as a reservoir for the virus.
Epidemiologists are trying to determine what the reservoirs for this pathogen are.

WordNet 3.0 Sense Numbers: 4